EXHIBIT 99.6 GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE PAYER--Social Security numbers have nine digits separated by two hyphens: i.e. 000-00-0000. Employer identification numbers have nine digits separated by only one hyphen: i.e. 00-0000000. The table below will help determine the number to give the payer. - --------------------------------------- --------------------------------------- GIVE THE FOR THIS TYPE OF ACCOUNT: SOCIAL SECURITY NUMBER OF-- - ----------------------------------------------- 1. An individual's account The individual 2. Two or more individuals The actual owner (joint account) of the account or, if combined funds, any one of the individuals(1) 3. Husband and wife (joint The actual owner account) of the account or, if joint funds, either person(1) 4. Custodian account of a The minor(2) minor (Uniform Gift to Minors Act) 5. Adult and minor (joint The adult or, if account) the minor is the only contributor, the minor(1) 6. Account in the name of The ward, minor, guardian or committee for a or incompetent designated ward, minor, or person(3) incompetent person 7. a. The usual revocable The grantor- savings trust account trustee(1) (grantor is also trustee) b. So-called trust account The actual that is not a legal or owner(1) valid trust under State law GIVE THE EMPLOYER FOR THIS TYPE OF ACCOUNT: IDENTIFICATION NUMBER OF-- -------- 8. Sole proprietorship The owner(4) account 9. A valid trust, estate, or The legal entity pension trust (do not furnish the identifying number of the personal representative or trustee unless the legal entity itself is not designated in the account title)(5) 10. Corporate account The corporation 11. Partnership account held The partnership in the name of the business 12. Association, club, The organization religious, charitable, educational or other tax- exempt organization 13. A broker or registered The broker or nominee nominee 14. Account with the The public entity Department of Agriculture in the name of a public entity (such as a State or local government, school district, or prison) that receives agricultural program payments --------------------------------------- - --------------------------------------- (1) List first and circle the name of the person whose number you furnish. (2) Circle the minor's name and furnish the minor's social security number. (3) Circle the ward's, minor's or incompetent person's name and furnish such person's social security number. (4) You must show your individual name, but you may also enter your business or "doing business as" name. You may use either your social security number or employer identification number. (5) List first and circle the name of the legal trust, estate, or pension trust. NOTE: If no name is circled when there is more than one name, the number will be considered to be that of the first name listed. GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 PAGE 2 OBTAINING A NUMBER If you don't have a taxpayer identification number or you don't know your number, obtain Internal Revenue Service Form SS-5 (Application for Social Security Number Card) or Form SS-4 (Application for Employer Identification Number) from your local office of the Social Security Administration or the Internal Revenue Service and apply for a number. PAYEES EXEMPT FROM BACKUP WITHHOLDING Payees specifically exempted from backup withholding on ALL payments include the following: . A corporation. . A financial institution. . An organization exempt from tax under Section 501(a) of the Internal Revenue Code of 1986, as amended (the "Code"), or an individual retirement plan or a custodial account under Section 403(b)(7) of the Code. . The United States or any agency or instrumentality thereof. . A State, the District of Columbia, a possession of the United States or any subdivision or instrumentality thereof. . A foreign government, a political subdivision of a foreign government, or any agency or instrumentality thereof. . An international organization or any agency or instrumentality thereof. . A registered dealer in securities or commodities registered in the United States or a possession of the United States. . A real estate investment trust. . A common trust fund operated by a bank under Section 584(a) of the Code. . An exempt charitable remainder trust, or a non-exempt trust described in Section 4947(a)(1) of the Code. . An entity registered at all times under the Investment Company Act of 1940. . A foreign central bank of issue. PAYMENTS EXEMPT FROM BACKUP WITHHOLDING Payments of dividends and patronage dividends not generally subject to backup withholding include the following: . Payments to nonresident aliens subject to withholding under Section 1441 of the Code. . Payments to partnerships not engaged in a trade or business in the United States and which have at least one nonresident partner. . Payments of patronage dividends where the amount received is not paid in money. . Payments made by certain foreign organizations. . Payments made to a nominee. Payments of interest not generally subject to backup withholding include the following: . Payments of interest on obligations issued by individuals. NOTE: You may be subject to backup withholding if this interest is $600 or more and is paid in the course of the payer's trade or business and you have not provided your correct taxpayer identification number to the payer. . Payments of tax-exempt interest (including exempt interest dividends under Section 852 of the Code). . Payments described in Section 6049(b)(5) of the Code to nonresident aliens. . Payments on tax-free covenant bonds under Section 1451 of the Code. . Payments made by certain foreign organizations. . Payments made to a nominee. Exempt payees described above should file Substitute Form W-9 to avoid possible erroneous backup withholding. FURNISH YOUR TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, SIGN AND DATE THE FORM AND RETURN IT TO THE PAYER. IF YOU ARE A NONRESIDENT ALIEN OR A FOREIGN ENTITY NOT SUBJECT TO BACKUP WITHHOLDING, FILE WITH PAYER A COMPLETED INTERNAL REVENUE FORM W-8 (CERTIFICATE OF FOREIGN STATUS). Certain payments other than interest, dividends, and patronage dividends that are not subject to information reporting are also not subject to backup withholding. For details, see Sections 6041, 6041A(a), 6045, and 6050A of the Code. PRIVACY ACT NOTICE--Section 6109 of the Code requires most recipients of dividend, interest or other payments to give taxpayer identification numbers to payers who must report the payments to the Internal Revenue Service. The Internal Revenue Service uses the numbers for identification purposes and to help verify the accuracy of your tax return. Payers must be given the numbers whether or not recipients are required to file tax returns. Payers must generally withhold 31% of taxable interest, dividends and certain other payments to a payee who does not furnish a taxpayer identification number to a payer. Certain penalties may also apply. PENALTIES (1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER--If you fail to furnish your taxpayer identification number to a payer, you are subject to a penalty of $50 for each such failure, unless your failure is due to reasonable cause and not to willful neglect. (2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING--If you make a false statement with no reasonable basis which results in no imposition of backup withholding, you are subject to a penalty of $500. (3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION--Wilfully falsifying certifications or affirmations may subject you to criminal penalties, including fines and/or imprisonment. (4) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS--If you fail to include any portion of an includable payment for interest, dividends, or patronage dividends in gross income, such failure will be subject to a penalty of 5% on any portion of an under-payment attributable to that failure unless there is clear and convincing evidence to the contrary. FOR ADDITIONAL INFORMATION CONTACT YOUR OWN TAX ADVISOR OR THE INTERNAL REVENUE SERVICE